MODIS-derived NDVI Metrics

Summary

GINA and the National Park Service worked together to develop a MODIS-derived NDVI metrics algorithm. The data products from this project are available as a Web Coverage Service (WCS) with MODIS-derived yearly NDVI metrics. The data coverage includes the entire state of Alaska for the years between 2000 and 2010.
modis ndvi1

Data Sources

The NDVI metrics algorithm uses eMODIS data provided by the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center. The data can be downloaded from the USGS-EROS eMODIS website.

Product Details

NDVI Metrics WCS URL: http://ndvi.gina.alaska.edu/metrics?
The algorithm takes 7-day composite eMODIS NDVI data, performs data stacking, interpolating, smoothing, and then calculates the NDVI metrics. 12 metrics are produced by the algorithm:

  • Onset of greenness /Start day of Season (SOS)
  • NDVI value of onset of greenness
  • End of greenness /End day of Season (EOS)
  • NDVI value of end of greenness
  • Duration of greenness – day range between onset of greenness and end of greenness
  • Day with maximum NDVI
  • Value of maximum NDVI
  • Range of NDVI
  • Rate of green up
  • Rate of senescence
  • Time-integrated NDVI
  • Metrics ‘flag’, where -1=no data, 0=not valid data, 1=good data
  • Sample Plots of the Metrics

    modis ndvi1.5 modis ndvi2 modis ndvi3

    Additional Information About GINA MODIS NDVI Services

    The NDVI metrics algorithm technical document is available online along with the poster for the metrics algorithm presented on the 47th Annual Alaska Surveying and Mapping Conference Feb. 18-22, 2013.

    Acknowledgements
    Amy E. Miller, Chuck Lindsay, Parker Martyn from National Park Service Anchorage for developing NDVI metrics algorithm

    David K. Swanson for evaluation and feedback of NDVI metrics algorithm Ecologist, Arctic Network National Park Service

    Michael E Budde for evaluation and feedback of NDVI metrics algorithm Geographer - US Geological Survey Earth Resources Observation and Science (EROS) Center

    Calli B. Jenkerson for providing and explanation of eMODIS products MODIS SS NASA LPDAAC USGS EROS ERT Contractor to the U.S. Geological Survey (USGS) Earth Resources Observation and Science (EROS) Center http://lpdaac.usgs.gov

    Tom Heinrichs at GINA for project management

    Dayne Broderson at GINA for project management, helping develop the algorithm and documentation

    Jay Cable at GINA for data management and presentation of metrics data in WCS

    Will Fisher at GINA for editing the documentation

    Top